There are free Kindle editions of the US Constitution, Bill of Rights, History of the US etc...
OK, I'll stop now, unless something really interesting pops up...
[ame="http://www.amazon.com/The-United-States-Constitution-ebook/dp/B004TPCQWC/ref=sr_1_212?s=digital-text&ie=UTF8&qid=1339380769&sr=1-212"]http://www.amazon.com/The-United-States-Constitution-ebook/dp/B004TPCQWC/ref=sr_1_212?s=digital-text&ie=UTF8&qid=1339380769&sr=1-212[/ame]
OK, I'll stop now, unless something really interesting pops up...
[ame="http://www.amazon.com/The-United-States-Constitution-ebook/dp/B004TPCQWC/ref=sr_1_212?s=digital-text&ie=UTF8&qid=1339380769&sr=1-212"]http://www.amazon.com/The-United-States-Constitution-ebook/dp/B004TPCQWC/ref=sr_1_212?s=digital-text&ie=UTF8&qid=1339380769&sr=1-212[/ame]